Adjustable crosshead



Aug. 23, 1932. T. ROGAT-CHOFF ADJUSTABLE CROSSHEAD Filed March 5, 1927 2 Sheets-$heet 1 fl? 309a i cho @LMJQZ; vwll, Wu

Patented Aug.23, 1932 I i i i r r h rnnononn Mau ham; OF A TIMORE, MAnY ANn I ADJUsrAnLn enossnnni) Application filed March 1927. serial no. 172,505; r l v This invention relates to the adjustment tending projections 8 twhioh -ar e received ber' of crossheads of locomotives although it is tween the plates 2 and-3; 'Tie bolts 9' extend of course adapted forxuse on other steam transversely through the plates 2 and 3 and T S A WTQF E engines, or power plants which crossheads through grooves formed in the extensions 8 l Y I 5 are employed.

One of the prlmary objects of the invenspreading and also serving to p'reven-t move tionresides in the provisionof means for ment of the shoes 6 longitudinally of the the adjustment of a crosshead which is comcrosshlead. I I v j 5 paratively simple in construction, whereby The foregoing structure is well known in the adjustment may be quickly accomplished crosshead construction and is mentioned here 50' and: thereby avoid pounding of a erosshead only msotarasis necessary to emphasize the between the guide bars, which not only rap; present 'lnventlon which Will now "be de idly increases wear and tear on crosshead scribed. Y j V I shoes, but also other vparts as well. 13181308861 between the 8110856 d t 'b y thereby serving to hold the plates against 55 V Another object of the invention consists in p tion of the crosshead are U-shaped wedges 35 1 the provision of a reliablemechanism for se- ,1311? prongs 11 of which engage the edges of j curely locking the adjusting means against the SlClQ plates 2 and 3 and the :bflS 0f the displacement after the adjustments have-been $11068 The purpose of these Wedges is'to d i V j provide an adjustment wherebythe w'ear on t Other objects andoadvantag'es of the in-' the 311995 y hp so as h vention will be apparent from the following p h g of e 0 i l Other description when taken in connection with ental eflf'ectsdlrectly attrrbut bleio the accompanying drawings; in which g COIIIIQCBIDHS be w n therqsshead. and Figure l'is a perspective view of a locog p the Present mhodhheht' of motive crosshead with the improved adjustth'invenfion 'w dg 10 are'adarted t6 he 75 ing means in place "fi ereo V V Figure 2 is a side'elevation' of thecro'ss-v means of a rack a p hh ack bemg r head, p ly i ti v integrally formed on the wedge 10 and 'des g Figure?) is a vertical transverse section hated 5 t 11111116171112-v Thls Tack xte ds taken on line 3.3 OfFigureQ. i 1 between h p g f h W dg and 80 Figure t is a fragmentary side elevation, pe s Wlth a! P h y or partly in section, or" a slightly modifiedform h formed Oh a f o hhlt of crosshead r a r v This shaft orbolt 14: extendstransversely Figure 5' is a'vcrtical transverse section r h h hhe'rplhtes 2 a h 1h ordghhhat t k 1in ,5 5 Figure j V rotation of the shaft and plnlon maybe pre- 5 Figure 6 is a perspective view of one of the hi afterthe wedge, 13 moYed di' te adjusting Wedges; d Y 7 position one end of the shaft 1s formed with Figure 7 is a fragmentary detail View afrushocohlca'lhegld W 9 fits/111110 aslhilr showing one of the locking devices for the 3 p h p g 1h l3he p After Wedgg V i H I x V the ,wedgels properly installed or after a 9, Referring to the drawings in detail and later 'lh h the Q h hd- 15 is especially to Figures 1', 2, 3 and 6, the numeral brought WQ g actloh t 9 Well 1 indicates generally the usual crosshead, h? hpehlhg. m the P 3 h h the body portion of which is formed of the p Oh h h 16 ad t the Shaft I side plates 2 and 3 and the sleeve 4 in which hohi' It W111 f ly uhdergtood th the piston rod 5-is securely fastened. the g y he adlllisted y re y 1 1 Mounted on the top and bottom of the body ening up on the nut 16 and thenutson bolts portion of the crosshead are the usual shoes 9 andthen turning thezshaft by means of a 6 which-are guided on the guidebars 7 and wrench; applied to the squared end 17-01% the which are provided with the inwardly ex- ShHLftZI E The upper and lower wedges for the shoes 6 are identical and may be used interchangeably; and in order to assist in preventing longitudinal movement of the wedges when in adjusted position one of the prongs 11 is provided with a rib 19 which seats in a notch in the inner sidewall of the side, plates 12 or 3 depending upon whether the upper or lower wedge is referred to. These notches are clearly shown in Figure '3 and are of c slightly less width "than the ribs 19,-wherebythe prong 11 is brought into tight gripping contact'with the shoe and side plates when the bolts 9 are tightened upv 'Also to prevent spreading of the wedges 10 metal strips or lugs 18 are connectedtoj thesideplates 2 and 3-soi'as to-slightly overhangthe prongs 11 and prevent outward tmovement thereof.

Itwill be understood by those. skilled in the art that the crosshead' of' an' engine is under a very heavy strain when in" use and that therefore under; certain circumstances there is a possibility of the bolt or shaft lt becoming loose due to bad, wornor stripped threads providedwith stop lugs 20, which, when the wedge in position, cooperate with" one of theprqecting'end's of a bar 21 fixed on the head ofone of thetie' bolts 9, thereby pre- 7 venting retrograde movement of the-wedge. There" would of course vbe -a tendency under these circumstances, for the bolt '9 carrying the bar 21 to be rotated about its axis" and to avoid this movement of the bar 21 alug'22 isformedon the side plate 3' andicooperates with the adjacentend of the bar 21*so asto prevent itsrotation; V, s i V In. the modified form of the invention shown-in Figures 4 and 5 theidentical form of U sha'ped wedgeiis employed as depicted in Figure 6 and heretofore described. In this second form of the invention however, the means for mountingthe pinion is slightly modified due to the fact that asoniewhat different'type of'crosshead isemployed; i'. e., a crosshead-in' which the side plates are such; as topreclude the use of a shaft such asshaft 14;

previously described.- Consequently the modified form of the" invention contemplates the I use of a lug 3O arising from the sleevei31 and V in which is mounted a shaft 1 with a -frusto-conical portion Y D V H p or'bolt 32. Apinion 33 is formed on this shaft32 for cooperationwith the rack 12' of the U-shaped adjust; I

mg wedge, and thisshaft is also provided 34 which is caused to wedgeinto theta-peredopening in the lug 30 when the nut 35is tightened up and thus prevent rotation of the bolt. ,Theiend of the bolt remote from the pinion 33 is provided with flat faces 36 for the reception of awrench in operating the pinion33. V

c The operation of this form of the invention is identical with that previously described and need not be further referred to; likewise the several safeguards described in connection with the'first form of the invention form a p'artof the modified form and need not be here described in detail. I

From the foregoing description taken in connection with the accompanying drawings it will be apparent that I have devised a com-- Y pa'ratively simple means for adjusting crossheads, onevwhich may be easily and quioklyinstalled on all'types of crossheads now in use; that the adj ustingmeansis'readily accessible and easilyoperated"; that'all necessary safeguards are provided agalnsti loss or disorganiz ation 'iof' the adjusting means; and that due to the simplicity of adjustment the play between the shoes and, the

guideba'rs will be more often remedied therei 1 V by permitting a much longer service of the shoes as well as areductionin repairs'and purchases ofnewparts. I I p c 'In accordance with the patent statutesl have described what Ino'w believe :to'be the best embodiment of the invention, but I "do not wish to be understood therebyras limiting myself or the scope of the invention as'many changes andmodifications may be made with-' out departing from the spirit of the invention all such I aim to include within thescope of the appendedclaims.

What I claim as new and desire to secure'by LettersPatent is: r f i 1. adjusting element for locomotive crosshead'scomprising a U-shaped wedge, an integral v arm. extending midway between the prongs of "said wedge and provided with .7 means'whereby the wedge may be'operated; An'adjusting' element for locomotive crossheads comprisingfa U-shaped wedge', an arin'extendin-g midway" between the prongs of said wedge, and airack formed on said arm.

3. .An adjusting element for locomotive crossheads comprising a Usshaped wedge, a rack disposed midway between the prongs of said wedge'and a rib extending longitudinally along the inner edge of one of sai'd prongs,

4. An adjusting element .for locomotive crossheads comprising a Ushaped wedge member, a rack formed integrally with the base of said'wedge and extending between the prongs thereof, an integral rib extending longitudinally along the inner edge of one of said prongs, and an integral stop lug ext'endin'g'outwardly from one of the prongs. A locomotive c rosshead including a body-portion composed of spaced apart side plates, shoes mounted on the top and bottom' of'said body portion and having one or more pro ections extending into the space between said side walls, a wedge disposed betweenone of said shoes and the body portion of the I so i crosshead, means for adjusting said wedge longitudinally, a stop lug on said wedge, tie bolts extending transversely through said plates, and a projection formed on one of said bolts so as to extend into the path of said stop lug and prevent loss of the wedge.

6. A locomotive crosshead including a body portion composed of spaced apart side plates, shoes mounted on the top and bottom of said body portion and having one or more projections extending into the space between said side walls, a wedge disposed between one of said shoes and the body portion of the crosshead, means for adjusting said wedge longitudinally, a stop lug on said wedge, tie

bolts extending transversely through said plates, a projection formed on one of said bolts so as to extend into the path of said stop lug and prevent loss of the wedge, and

a lug on the body portion of the crosshead for cooperation with said bar to prevent rotation of the bolt when the wedge is in position.

7. A locomotive crosshead including a body portion, shoes at the top and bottom of said body portion, a wedge interposed between one of the shoes and the body portion of the crosshead, a rack integral with and located midway between the prongs of said wedge, a rotatable shaft disposed transversely of said body portion for cooperation with said rack, said shaft having a tapered portion fitting in a tapered opening in said body portion, and a nut threaded on the shaft for producing locking engagement of the tapered surfaces to prevent rotation of said shaft.

8. An adjusting wedge for locomotive crossheads and the like comprising a U- shaped body member with uniformly inclined homologous faces on its prongs, and a rackbar approximately midway between the legs of said body member, theface of said rackbar carrying the rack teeth being approximately in the same plane with said homologous faces and similarly inclined, substan tially as set forth.

9. An adjusting wedge for locomotive crossheads and the like comprising a U- shaped body member with uniformly inclined 5 homologous faces on its prongs, and a rackbar approximately midway between the legs of said body member, the face of said rackbar carrying the rack teeth being approximately in the same plane with said homologous faces and similarly inclined, and lugs at the outer sides of said prongs adapted to cooperate with stops on the body of a crosshead for preventing loss of a wedge, substantially as set forth.

THEODORE ROGATCHOFF. 

